End fitting



May 25 1926.. 1,585,688

C. V. PERRY END FITTING Filed June 4, 1924,

l Patented May 25, 1926.

UNITED STATES PATENT OFFICE.

CHARLES V. PERRY, F WEST HAVEN, CONNECTICUT, ASSIGNOR 0F ONE-HALF TOLEONARD I. BOSWORTH, OF BARRINGTON, RHODEISLAND.

END FITTING.

Application filed .Tune 4,

My invention relates to end fittings for electrical conduits or cablesin distinction from pipe fittings.

The essential objects of my invention, in

addition to the ends commonly sought, are to enable the use of thefitting upon a flexible cable or the like without requiring the usualthreaded connector; to insure a firm engagement of the fitting with thecable; to prevent injury to Wire insulation during installation; and toattain these ends in a simple and inexpensive structure.

To the enumerated ends essentially my invention consists inv such partsand in such combinations of parts as fall Within the scope of theappended claim.

In the accompanying drawings which form a part of this specificationFigures 1 and 2 are a side anda rear elevation respectively of an endfitting embodylngvmy invention,

4igures 3 and 4, a section on line 3 3 of Figure 2, and a section online 4 4 of Figure 1 respectively, and

Figure 5, a section of the fitting engaged with the end of a cable takenon a line 3 3 of Figure 2, and showing the cable in side elevation.

In detail my fitting comprises a thin metallic sleeve 6 having anintermediate transverse lslot 7 forming a shank portion 8 and an endportion 9, the latter being longitudinally split as at 10 to form aclamping portion havingupon its resilient sections 11 lparallelprojecting ears 12 provided with perforations 14 adapted to receive aclamping screw 15 whose head 16 engages one ear, y while a nut 17thereon engages the other ear. The interior of' the clamplng portion 9of y the sleeve is provided with knurls 20 or is l otherwise roughened.Lugs 22 on the inner end of the sleeve pass through slots 23 in a plate24 and terminate in bent ends 25 clamping the latter. The slots areradially dis- Q posed around a central circular hole 26 1n 1924. `Seria1No. 717,727.

the plate 24. The hole 26 is of less diameter than the sleeve 6 so thatthere results an integral inwardly directed flange 27 againstwhich abutsa spring guard ring 28 frictionally engaging the sleeve and serving as agrip for the wires and prevents contact of the insulation with theflange 27, said ring being of greater diameter than the opening throughsaid fiange, as seen in Figure 3. The transversely rounded innerperiphery of the ring is of less diameter than the hole 2G. Aninsulating head 3() has usual openings31 and is provided with a lateralperipheral shoulder 32 at its base and has a circular recess 33 in thelatter. The head 30 rests on the plate 24 and the shoulder 32 is looselyoverlapped by fingers 35 integral with the periphery of the plate.

In Figure 5 is shown a cable or conduit 36 comprising the usual ribbedsheath 37 surrounding rthe insulation 38 and wires 39. The conduit isclamped by the screw 15 and the resilient sections 11 within the sleeve8, l

the knurls 20 assisting in retaining the cable against longitudinalmovement in one direction andthe flange 27 in the other direction. Thering 28 when present not only guides the wires but protects theinsulation from contact with the flange 27. Vhen said ring is absent theflange 27 affords an abutment for the end of the sheath 37.

In an end fitting for cables, a sleeve comprising a shank portion and alongitudinally split clamp portion, a head plate provided with a centralopening fixed to the end of the shank portion and forming an internalannular flange, a resilient -split guard ring frictionally mounted inthe shank portion and abutting against the flange, and an insulatinghead attached to the plate.

In testimony whereof I have aliixed my signature.

CHARLES V. PERRY.

